McDonnell & Miller FPC-1000-P Control

LWCO W/STANDARD PROBE 144705

FPC-1000-P is the cross of 751P-MT-120

McDonnell & Miller FPC-1000-P Control – Universal Low Water Cut-Off (LWCO) with Standard Probe | Xylem 144705

Ensure maximum safety and reliability for your boiler system with the McDonnell & Miller FPC-1000-P (boilerwize) Low Water Cut-Off Control. Designed for both steam and hot water boilers, this universal, field-configurable LWCO delivers advanced protection using patented conductivity-monitoring technology. Suitable for residential, commercial, and industrial applications, it provides unmatched performance and flexibility for modern hydronic systems.

Product Highlights

• Max Pressure: 15 PSI (Steam), 160 PSI (Hot Water)

• Max Temperature: 250°F

• Voltage Options: 24V or 120V

• LWCO Type: Electronic with Standard Probe (Part No. 144705)

Description

The McDonnell & Miller FPC-1000-P (boilerwize) Control is a universal, field-configurable Low Water Cut-Off designed to protect both steam and hot water boilers from dangerous low water conditions. This advanced probe-type LWCO uses patented technology to monitor changes in water conductivity, ensuring the burner only shuts off when a true low-water event occurs—reducing nuisance trips while maintaining superior safety.

The FPC-1000-P can be easily configured for 24V or 120V, as well as automatic or manual reset, making it an ideal replacement for virtually all electronic LWCOs on the market.

How It Works

Using patented conductivity-sensing technology, the FPC-1000-P continuously evaluates water conditions. When readings exceed defined limits, the control determines whether to shut down the burner based on resistance variability. This ensures maximum protection without unnecessary burner interruptions. If an out-of-water condition is detected, the system automatically shuts off the burner for enhanced safety.

Features & Benefits

• Universal Configuration: Easily set for 24V, 120V, auto, or manual reset—compatible with most boiler systems.

• For All Applications: Suitable for residential, commercial, and industrial boilers.

• ASME CSD-1 Compliant: Meets strict safety requirements.

• Smart LED Indicators:

  • Green: Power On (Auto Mode)

  • Yellow: Manual Mode

  • Red: Low Water Condition

• Tri-Function Button:

  1. Push-to-Test – Quickly verify system operation.

  2. Manual Reset – For systems configured manually.

  3. Configuration – Simple setup of control modes.

• Self-Cleaning Probe: Minimizes scale buildup; extends cleaning intervals up to every 5 years.

• No Lockout on Power Loss: Prevents false lockouts when probe remains in water.

• Optional Bluetooth Connectivity: Enables mobile device communication and monitoring.

• Easy, Leak-Free Installation: Brass threads, wrench flats, and open wiring access ensure fast, reliable setup.

Specifications

• Max Pressure:

  • Steam: 15 PSI

  • Hot Water: 160 PSI

• Max Temperature: 250°F

• Max Ambient Temperature: 120°F

• Reset Type: Manual or Automatic

• Sensitivity: 20,000 ohms or 7,500 ohms

• Voltage Options: 24V, 120V

• Application: Hot Water & Steam Boilers

• Type: Electronic LWCO

Safety Information

• California Proposition 65 Warning

This advanced control unit is ideal for technicians, installers, and boiler professionals seeking a reliable, configurable, and OEM-grade LWCO solution for McDonnell & Miller systems.